As Mitt Romney campaigns on the promise to repeal Obamacare, some Republicans on Capitol Hill are trying to learn more about what the national health care law will actually do when it is fully implemented in 2014. Romney would do well to take a look at what they’ve discovered. Specifically, Romney might want to focus on the new and expanded role that the Internal Revenue Service will play in Americans’ lives as a result of the Affordable Care Act. The nation’s widely reviled tax collector will also become its health care enforcer. Once the law goes fully into effect, all …